Quantitative genetic variation in an ecological setting

H. Tachida, C. Clark Cockerham

研究成果: Contribution to journalArticle査読

6 被引用数 (Scopus)

抄録

The machinery was developed to investigate the behavior of quantitative genetic variation in an ecological model of a finite number of islands of finite size, with migration rate m and extinction rate e, for a quantitative genetic model general for numbers of alleles and loci and additive, dominance, and additive by additive epistatic effects. It was necessary to reckon with seven quadratic genetic components, whose coefficients in the genotypic variance components within demes, σGw2, between demes within populations, σs2, and between replicate populations, σr2, are given by descent measures. The descent measures at any time are calculated with the use of transition equations which are determined by the parameters of the ecological model. Numerical results were obtained for the coefficients of the quadratic genetic components in each of the three genotypic variance components in the early phase of differentiation. The general effect of extinction is to speed up the time course leading to fixation, to increase σr2, and to decrease σs ̄2 (with a few exceptions) in comparison with no extinction. The general effect of migration is to slow down the time course leading to fixation, to increase σGw2, at least in the later generations, and to decrease σs ̄2 (with a few exceptions) in comparison with no migration. Except for these, the effects of migration and extinction on the variance components are complex, depending on the genetic model, and sometimes involve interaction of migration and extinction. Sufficient details are given for an investigator to evaluate numerically the results for variations in the quantitative genetic and ecological models.

本文言語英語
ページ(範囲)393-429
ページ数37
ジャーナルTheoretical Population Biology
32
3
DOI
出版ステータス出版済み - 12 1987
外部発表はい

All Science Journal Classification (ASJC) codes

  • 生態、進化、行動および分類学

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